With the exception of functions/_dtoa/dtoa.c, which is under its own license, the following license applies to the whole of PDCLib.
PDCLib is distributed unter the Creative Commons CC0 License. You should have received a copy of the full legal text of this license as part of this distribution (COPYING.CC0). It is also available at
https://creativecommons.org/publicdomain/zero/1.0/legalcode
The following is a human-readable summary of that license.
No Copyright
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of his or her rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law.
You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission. See Other Information below.
Other Information
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When using or citing the work, you should not imply endorsement by the author or the affirmer.
This is a C Standard Library. Nothing more, nothing less. No POSIX or other extensions, just what's defined in ISO/IEC 9899.
(Well, this is what it will be when the 1.0 release comes out. Check http://pdclib.rootdirectory.de to see what is implemented so far.)
Check Quickstart.txt to get a "working" version of the library as quick as possible.
Check Internals.txt for an overview of technical intricacies.
Check Notes.txt for a list of credits and an idea of the standards I hold myself to in my work on PDCLib.